00001 #ifndef QPID_FRAMING_HANDLER_H
00002 #define QPID_FRAMING_HANDLER_H
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00024 #include "qpid/shared_ptr.h"
00025 #include <boost/type_traits/remove_reference.hpp>
00026 #include <assert.h>
00027
00028 namespace qpid {
00029 namespace framing {
00030
00032 template <class T>
00033 struct Handler {
00034 typedef T HandledType;
00035 typedef void handleFptr(T);
00036 typedef void result_type;
00037
00038 Handler(Handler<T>* next_=0) : next(next_) {}
00039 virtual ~Handler() {}
00040 virtual void handle(T) = 0;
00041
00043 void operator()(T t) { handle(t); }
00044
00045
00047 Handler<T>* next;
00048
00052 struct Chain : public Handler<T> {
00053 Chain(Handler<T>* first=0) : Handler(first) {}
00054 void operator=(Handler<T>* h) { next = h; }
00055 void handle(T t) { next->handle(t); }
00056
00057 };
00058
00060 struct Chains {
00061 Chains(Handler<T>* in_=0, Handler<T>* out_=0) : in(in_), out(out_) {}
00062 void reset(Handler<T>* in_=0, Handler<T>* out_=0) { in = in_; out = out_; }
00063 Chain in;
00064 Chain out;
00065 };
00066
00071 template <class F> class Functor : public Handler<T> {
00072 public:
00073 Functor(F f, Handler<T>* next=0) : Handler<T>(next), functor(f) {}
00074 void handle(T t) { functor(t); }
00075 private:
00076 F functor;
00077 };
00078
00082 template <class X, void (X::*F)(T)>
00083 class MemFunRef : public Handler<T> {
00084 public:
00085 MemFunRef(X& x, Handler<T>* next=0) : Handler(next), target(&x) {}
00086 void handle(T t) { (target->*F)(t); }
00087
00089 MemFunRef* operator->() { return this; }
00090
00091 private:
00092 X* target;
00093 };
00094
00099 class InOutHandlerInterface {
00100 public:
00101 virtual ~InOutHandlerInterface() {}
00102 virtual void handleIn(T) = 0;
00103 virtual void handleOut(T) = 0;
00104 };
00105
00110 struct InOutHandler : protected InOutHandlerInterface {
00111 InOutHandler(Handler<T>* nextIn=0, Handler<T>* nextOut=0) : in(*this, nextIn), out(*this, nextOut) {}
00112 MemFunRef<InOutHandlerInterface, &InOutHandlerInterface::handleIn> in;
00113 MemFunRef<InOutHandlerInterface, &InOutHandlerInterface::handleOut> out;
00114 };
00115
00116 };
00117
00118
00119
00120 }}
00121 #endif
00122 //